US3714879A - Reflex camera - Google Patents

Reflex camera Download PDF

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Publication number
US3714879A
US3714879A US00134733A US3714879DA US3714879A US 3714879 A US3714879 A US 3714879A US 00134733 A US00134733 A US 00134733A US 3714879D A US3714879D A US 3714879DA US 3714879 A US3714879 A US 3714879A
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Prior art keywords
exposure
film units
motor
photographic
drive
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US00134733A
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English (en)
Inventor
E Land
I Blinow
V Eloranta
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Polaroid Corp
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Polaroid Corp
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    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B17/00—Details of cameras or camera bodies; Accessories therefor
    • G03B17/48—Details of cameras or camera bodies; Accessories therefor adapted for combination with other photographic or optical apparatus
    • G03B17/50—Details of cameras or camera bodies; Accessories therefor adapted for combination with other photographic or optical apparatus with both developing and finishing apparatus
    • G03B17/52—Details of cameras or camera bodies; Accessories therefor adapted for combination with other photographic or optical apparatus with both developing and finishing apparatus of the Land type
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B19/00—Cameras
    • G03B19/02—Still-picture cameras
    • G03B19/12—Reflex cameras with single objective and a movable reflector or a partly-transmitting mirror

Definitions

  • ABSTRACT A fully automatic single-lens reflex camera configured to be foldable into a thin, compact shape suited for convenient carrying in the pocket of a garment. Thinness is achieved through a placement of a motor source adjacent one side of a rectangular film cassette within the housing of the camera and a roll-type processing station adjacent an opposite side of the cassette. A gear train having two branch circuits is coupled within the camera housing between the motor and the processing station along a third side of the film cassette.
  • Reflex operation of the camera is carried out in response to movement of a kinematic linkage including a ram extending along the length of the elongate gear train.
  • this reflex operator assembly is moved by the kinematic linkage between viewing and exposure positions.
  • a TTOR/VEYS PATEHTEDFEB 6 I975 SHEET 5 OF 6 .rzwsmojawa 2 m hZmEMUaJlQD 2 Q wmm 4 530 30 W mmm HSVHd 'lOHiNOO lNBWBOV'IdSIG d0 SBHONI INVENTORS EDWIN H. LAND IGOR BLINOW VAITO K. ELORANTA W mm and. Mgwmm A TTORNEYS PATENTEUFEB 6 I975 SHEET 6 0F 6 omv- INVENTORS EDWIN H. LAND IGOR BLINOW VAITO K. ELORANTA and 7721161 00nd.
  • a camera which performs in fully automated fashion while being structured so thinly and compactly as to be carried conveniently in the pocket of a garment has been an elusive subject of technical inquiry. Difficulties in the path of evolution of such a camera become more evident when the large number of features which ideally are incorporated within it are considered.
  • a fully automated photographic system desirably includes an optimum viewing and focusing system, fully automatic exposure control and motorized automatic processing. These sub-systems should all perform in proper sequence in response to the simple procedure of depressing a shutter release button.
  • the fully automatic cameras represent an instrumentality incorporating a complex multi-step process control system.
  • the auto mated cameras preferably utilize a form of single-lens reflex viewing.
  • reflex cameras normally assume a'viewing mode configuration in which their exposure plane is isolated from scene illumination by a flat movable operator or mirror and viewing surface assembly.
  • the operator assembly serves the function of providing a surface upon which a scene, in reflex fashion, may be framed and focused in preparation for an exposure.
  • depression of a start button on the camera commences a multi-step control causing its components to assume an orientation securing an exposure chamber by closing its shutter through an electromagnetic drive system.
  • the camera is caused to commence an exposure mode operation in which the earlier described operator assembly is released for movement under spring drive to uncover the exposure plane and provide a revised reflex optical path for subsequent exposure of the previously imaged scene.
  • the automatic exposure control sub-system of'the camera cycles through a regulated exposure interval, following which the shutter again closes to secure the exposure chamber.
  • the control system of the camera is then called upon to cock the operator assembly by driving it from an electrical motor into its viewing mode configuration.
  • an exposed photosensitive film unit is automatically removed from its position at the exposure plane and drawn through a motor driven rotating processing station.
  • the series of above-catalogued process control or operational events occurring throughout a photo graphic cycle illustrates the need for meeting the following design criteria: providing for an accurate physical monitoring of each operation to insert a requisite input to a closed loop electronic control network; providing a controlled power input for recocking the operator assembly following an exposure; providing accurately regulated drive input for a rotative film processing system; providing for an accurately timed mechanical release of the operator assembly to cause the camera to convert from a viewing operational mode into an exposure operational mode; and incorporating all of the above features within the extremely limited confines of a thin, compact camera structure suited to be conveniently carried within a pocket of a garment.
  • the present invention is addressed to a new thin and compact single-lens reflex camera which is fully automatic.
  • This automatic operation is carried out to perform the above-described series of control functions through the use of a control network operating in conjunction with a motor power source, a speed reduction and system kinematic drive assembly.
  • the ideally thin and compact shape of the automatic camera is realized through a unique geometry of association of various control functions therewithin.
  • the housing of the camera is configured as a thin parallelepiped, the central portion of which removably supports a somewhat rectangular cassette or the like retaining a quantity of film, one film unit of which is positioned at an exposure plane.
  • the motor for powering control and processing functions is mounted within the housing adjacent one side of the cassette and a film unit processing station is mounted adjacent a side of the cassette opposite that along which the motor is mounted.
  • a reduction system present as a thin gear train, is mounted within the housing between the motor and processing station along a third side of the cassette.
  • This gear train not only delivers power forwardly from the motor to the processing station, but also can be tapped to provide the rearwardly directed kinematic logic required for various other control functions of the automatic camera. For instance, a controlled translational kinematic output is readily devised for providing a reflex mode converting function.
  • the gear train is so combined with the kinetic drive assembly as to derive photographic cycle monitoring and timing output information. The latter informational feature permits an associated control circuit to operate as a closed-loop system.
  • Another feature and object of the invention resides in the provision of an operator assembly latching and release function through the use of a timing output stage of the above-noted gear train.
  • a timing output stage of the above-noted gear train.
  • the operator assembly may be retained in its viewing mode orientation by a latching arrangement extending from the cam through the kinetic linkage and into the pivotal mounting of the operator assembly.
  • the output stage can be activated to release the operator assembly latching engagement to permit conversion of the camera to an exposure mode orientation.
  • the motor drive system is re-energized to utilize the same output timing stage in conjunction with the kinetic linkage to cock or drive the operator assembly returning it to its initial viewing mode orientation and retaining it there in latching fashion.
  • Another feature and object of the invention is to provide a single-lens reflex camera of thin, compact construction which is fully automated, incorporating an electric motor drive in combination with a gear train and kinetic linkage.
  • the latter motor driven gear train and kinetic linkage arrangement is operative to convert an operator assembly of the camera from a viewing mode orientation to an exposure mode orientation and to return the operator assembly to its initial viewing mode orientation at the conclusion of an exposure interval.
  • the motor driven gear train assembly also is operative to provide rotative drive for a film processing station incorporating a pair of mutually rotatable process rolls. Processing of a film unit through these rolls occurs simultaneously with the above-described cocking function, returning the operator assembly to its viewing mode orientation.
  • the gear train is formed having two power flow circuits or branches, one coupled in driving relationship with the processing station and the other coupled in driving relationship with the timed output stage used for cocking and other control purposes.
  • the outputs of the two circuits are separated by a substantial reduction ratio.
  • a further advantage of the gear train and kinetic linkage assembly of the invention resides in its placement along the lengthwise thin dimension of the camera. Proper power and timing outputs are developed along the side of the camera as the gear train extends from a rearward operator assembly pivot. Appropriate power and timing can then be tapped at an intermediate circuit branch of the gear train to return translational or kinetic motion to the pivot to provide cocking and latching functions. With such an arrangement, the camera can be motorized and fully automated while still retaining the desirable dimensions necessary for cameras carried in the pocket of a garment. 7
  • Another object and feature of the invention is to provide a fully automated reflex camera incorporating automatic mode conversion, automatic exposure control and automatic motor driven film processing within each photographic cycle thereof.
  • This camera incorporates a reflex operatorassembly having a cocked position for operating the camera in a viewing mode, the assembly being movable during a photographic cycle into an erect position for operating the camera in an exposure mode.
  • Spring means are utilized for urging the operator assembly to move toward its erect position to establish the exposure mode.
  • the camera also incorporates an electric motor which is coupled in driving relationship with a gear reduction train which provides rotational drive not only for a processing station but also to establish an intermediate output stage having a predetermined period of rotation during each photographic cycle.
  • the output stage is coupled with a cam assembly having a periphery with an initial high dwell portion juxtaposed to a sudden return portionand the terminus of a rising profile portion.
  • a kinematic linkage is coupled through a follower in operative association with the cam as well as with the operator assembly. Through this coupling, the kinetic linkage retains or latches the operator means in its viewing mode orientation prior to the commencement of a photographic cycle. This is carried out by virtue of the contact of its follower with the initial high dwell portion of the cam.
  • An initial energization of the electric motor rotates the cam to cause the kinetic linkage follower to fall across the sudden return portion and permit the operator assembly to move under the spring into its erect exposure mode orientation.
  • the motor is again energized to rotate the cam as well as drive rolls of the processing station through the gear train and cause the rising profile portion of the cam to move the kinetic linkage in a manner recocking the operator assembly, returning it to its viewing mode orientation.
  • Switch means are incorporated with the kinetic linkage to de-energize the motor when the operator assembly has returned to its initial viewing mode orientation.
  • An additional object of the invention is to provide a resetting operation of the above-noted cam and kinetic linkage with the commencement of each photographic cycle. For instance, should the kinetic linkage follower not have returned to its initial position at the high dwell portion of the cam as a photographic cycle ends, at the commencement of a next succeeding photographic cycle, the cam will rotate until the sudden return portion is reached to signal as well as cause the commencement of operator assembly movement. Accordingly, switching operations actuated by the kinematic linkage take place at consistent or stabilized points within an operational cycle.
  • the invention accordingly comprises the apparatus possessing the construction, combination of elements and arrangement of parts which are exemplified in the following detailed disclosure.
  • FIG. 1 is a pictorial representation of thesingle-lens reflex camera according to the invention showing its compact folded configuration suitable for carrying in the pocket of a garment; v
  • FIG. 2 is a pictorial representation of the single-lens reflex camera of FIG. 1 showing its erected shape with portions broken away to reveal internal structure;
  • FIG. 3 is a top view of the body or housing portion of the camera of FIG. 2 with portions broken away or removed to more clearly reveal the gear train and motor drive assembly thereof;
  • FIG. 4 is a side elevational view of the gear train of FIG. 3 with portions removed to reveal internal structure
  • FIG. 5 is a rear fragmentary view of the motor and drive assembly of the camera of FIG. 2 with portions broken away to more clearly reveal internal structure;
  • FIG. 6 is a sectional view of portions of the drive system of FIG. 5 as taken through the plane 6-6 of FIG. 5;
  • FIG. 7 is an exploded perspective view of portions of the drive assembly of FIGS. 5 and 6;
  • FIG. 8 is a side elevational view of the camera of FIG. 2, similar to FIG. 4 but showing the orientation of components during an intermediate stage of a photographic cycle;
  • FIG. 9 is a side elevational view of the camera of FIG. 2 showing the orientation of components of the kinetic drive and gear assembly during a post exposure interval operation;
  • FIG. 10 is a displacement diagram of a cam as used in conjunction with the timing output stage of the drive assembly shown in FIGS. 2, 4, 8 and 9;
  • FIG. 11 is a schematic representation of the dual power flow or branch circuits of the gear train of the camera of the present invention.
  • FIG. 12 is a chart showing the relative actuation times of important components of the mechanism of the invention during a photographic cycle.
  • FIG. 13 is a circuit diagram illustrating a control system for use with the camera of the invention.
  • FIG. 1 an automatic camera according to the present invention is illustrated in a configuration wherein it is folded for purposes of being carried in the pocket of a garment.
  • Camera 10 is formed having a very thin and compact configuration, substantially all of its bulk being contained within a rectangularly shaped base 12.
  • the upper surface of the camera 10 includes a rear wall 14 which is hinged at 1.6 to one end of the base 12.
  • a forward wall 18 hinged thereto at 20.
  • Forward wall 18 is, in turn, pivotally connected to an exposure control housing 22 through a hinge 24.
  • exposure control housing 22 nests inwardly within base 12.
  • Supported above the walls 14 and 18 is a top cap 26 of a collapsible optical entrance assembly as is illustrated in FIG. 2 atf28.
  • the camera 10 is shown in its erected state.
  • exposure control housing 22 is withdrawn from its nesting orientation within base 12 so as to position an optical objective or taking lens assembly 32 for making an exposure.
  • a photocell entrance assembly 34 is also oriented in conjunction with the field of lens assembly 32.
  • Exposure housing 22 additionally incorporates a release or start button 36 which is manually depressed to commence a photographic cycle.
  • rear wall 14 is supported by erecting linkages as at 40 in a position angularly extending from base 12 at hinge 16.
  • forward wall 18 is angularly oriented between hinges 20 and 24 to form the upward surface of the erected camera.
  • an exposure chamber indicated generally at 42 When so erected, these components combine to form an exposure chamber indicated generally at 42.
  • the lighttight integrity of chamber 42 is provided by a flexible, opaque bellows, a fragment of which is shown at Base 12 is configured at the bottom of exposure chamber 42 to receive and support a disposable film retaining cassette structure, a portion of which is shown at 50.
  • Cassette structure 50 is of rectangular configuration and retains a stacked array of discrete film units, the uppermost one of which is positioned as at 52, in coincidence with the exposure plane of the camera 10.
  • Light access to the uppermost film unit 52 is made through a rectangular opening or film frame formed within the cassette as at 54.
  • frame members as at 56 are formed therewithin which communicate with the upstanding ridge of the film frame 54.
  • Cassette 50 also contains a flat battery power supply in its lowermost portion which communicates with terminals (not shown) in the base 12. Additionally, the forwardmost peripheral side of the cassette 50 is formed having an egress opening or slot at 58 through which the uppermost film unit 52 automatically is removed for processing following its exposure.
  • film units as at 52 include all the materials necessary to produce positive photographic prints.
  • one feature of the units 52 resides in the provision of a rupturable container of processing fluid secured to the photosensitive composite in a position such that it is located near to slot 58.
  • the container selectively ruptures and uniformly dispenses a processing fluid therewithin. Image-forming results from this processing procedure.
  • each unit 52 includes an opacifying agent which is spread as a layer to provide a background for the photosensitive transfer image evolved during development.
  • opacifying agent which is spread as a layer to provide a background for the photosensitive transfer image evolved during development.
  • film units require a processing technique ensuring a properly regulated, smooth or continuous spreading of fluid to assure a uniformly developed image.
  • a reflex operator assembly shown generally at 60, is retained in a spring loaded or cocked orientation over the film frame 54, blocking the passage of light therethrough.
  • Operator assembly 60 is configured on one side (uppermost in FIG. 2) to support a viewing surface 62 which faces into the exposure chamber 42 when in a viewing operational mode.
  • Assembly 60 supports a mirror or similarly specularly reflecting surface 64 upon its somewhat flat surface opposite viewing surface 62.
  • the operator assembly 60 is coupled to the rear of base 12 through hinge extensions 68 and 70 positioned at each side of the rearward edge thereof. Turning momentarily to FIG. 5, these hinge extensions are seen to be journaled for rotation, respectively, about shafts 72 and 74. Shafts 72 and 74 are supported, respectively, from dual extensions 76 and 78 of the frame of base 12.
  • camera When in the viewing operational mode shown, camera establishes an optical path extending from taking or objective lens system 32 within exposure housing 22 to a mirror or specularly reflecting surface (not shown) fixed within the exposure chamber 42 to the inward side of rear wall 14, thence to the viewing surface 62 upwardly facing from operator assembly 60.
  • Viewing surface 62 is configured having a texture and optical design facilitating the focusing of the image of the scene to be photographed. This image may be viewed by the camera operator through optical entrance assembly 28.
  • a configuration suited for viewing surface 62 is described and claimed in a copending application for U.S. Pat., Ser. No. 83,030, filed Oct.
  • the exposure control system of the camera 10 provides for an open shutter condition with widest available aperture. This is achieved within the control program through the use of a dual bladed shutter shown generally at 90.
  • Shutter 90 is structured having two mutually coacting blades 92 and 94 which reciprocally move by virtue of their coupling with a reciprocating beam 96.
  • Blade 92 is coupled to one end of beam 96 at a pin and slot union 98, while blade 94 is coupled through a pinand slot union 100 at an opposite tip thereof.
  • Blades 92 and 94 are formed having selectively tapered aperture openings which combine to define progressively varying apertures 102 as the beam 96 is rotated about its center point.
  • FIG. 2 An aperture 102 of the maximum dimension defined by the blades 92 and 94 is illustrated in FIG. 2.
  • the size of the aperture at 102 will vary in dependence upon light levels and related exposure parameters dur- PHOTOGRAPHIC CYCLE IN GENERAL Aperture opening 102 is normally retained in its fully open condition by virtue of tension exerted by a spring 108 connected between beam 96 and the exposure control housing 22.
  • Uppermost film unit 52 is isolated from light directed into the exposure chamber 42 during viewing and focusing procedures by operator assembly 60. Formed of materials opaque to light, the operator assembly 60 is dimensioned to be capable of covering film frame opening 54 in light sealing fashion.
  • the initial portion of a photographic cycle of camera 10 includes operational steps which convert the camera from the viewing operational mode shown in FIG. 2 to an exposure operational mode. Conversion is carried out by closing shutter and pivotally moving operator assembly 60 to a position resting against the inward side of housing rear wall 14. This maneuver uncovers the exposure plane at 52 and establishes an altered optical path extending from lens system 32 to reflective surface 64 on the inward side of operator assembly 60, thence to the exposure plane at 52. Closing motion is imparted to blades 92 and 94 of shutter 90 from a solenoid supported within the housing 22. Solenoid 110 is formed having a centrally disposed plunger 112, the comb-shaped end of which is pivotally attached in eccentric fashion to reciprocating beam 96. As the winding of solenoid 110 is energized, plunger 112 is retracted to rotate beam 96 and cause the shutter blades 92 and 94 to close the aperture at 102.
  • subsidiary openings 104 and 106 of the shutter 90' admit a correspondingly increasing amount of light into the photo-sensing network of the control system of the camera.
  • the winding of solenoid 110 is again energized to terminate an exposure by withdrawing plunger 112 to rotate reciprocating beam'96 against the bias of spring 108.
  • Shutter 90 is described and claimed in a copend-' ing application for U.S. Pat. by Vaito K. Eloranta, Ser. No. 68,919, entitled, Exposure Control System, filed Sept. 2, 1970 and assigned in common herewith.
  • the camera 10 automatically processes an exposed film unit 52.
  • this processing is'carried out by automatically moving uppermost exposed film unit 52 through slot 58 and into engagement with the driven processing rolls and 122 of a processing station indicated generally at 124.
  • a pick mechanism (not shown) is utilized to impart the initial movement introducing film unit 52 between rolls 120 and 122.
  • shutter 90 is opened to its fullest extent and the entire control system is automatically shut down. Because of the programmed delays for securing exposure chamber 42 and for providing appropriate conversion between viewing and exposure orientations of operator. assembly 60, the control system of the camera requires a physical monitoring of process steps as they occur as well as a powering capacity for physically carrying out all of the operations. Further, all of the above processing operations and their related control elements must be confined within a camera structure which can be folded to the thin, compact shape shown in FIG. 1.
  • Operator assembly 60 is spring driven from its viewing mode orientation into its exposure mode orientation and is cocked by an electrically powered drive system which simultaneously powers roll 122 of processing station 124.
  • a distribution of power between processing and cocking is made through a thin elongate gear train shown generally at 126 extending from the motor drive at the rear of the camera to processing station 124 along a side or edge of cassette 50.
  • Gear train 126 not only provides an accurately controlled drive for processing station 124, but also provides an output station for developing the drive required to cock operator assembly 60 as well as for mechanically unlatching it at the commencement of an exposure cycle. Additionally, this output station provides control over and physical monitoring of the progress of a photographic cycle as it is carried out.
  • motorized drive components for powering gear train 126 are revealed in detail along with the spring-driven mounting of operator assembly 60.
  • Motive power is derived from an electric motor 130 attached to the rear portion of frame 12 adjacent the rear edge of cassette 50.
  • the output shaft 0 132 of motor 130 is connected to the first drive pinion 134 of gear train 126 through a supporting arrangement including a spring-type slip clutch 136.
  • Spring clutch 136 is frictionally attached between output shaft 132 of motor 130 and the drive shaft 138 of pinion 134.
  • shaft 138 Fixed to pinion 134, shaft 138 is rotatably supported within a bushing 140 fixed to an inner portion 144 of frame 12. An E-ring 142 is connected to shaft 138 within an appropriate groove formed in the circumference thereof.
  • Spring clutch 136 is configured such that it will tend to unwind and release from frictional engagement between shaft 132 and shaft 138 should the load from gear train 126 exceed a predetermined limit. The incorporation of this form of clutch additionally facilitates the assembly of the entire drive unit.
  • Operator assembly 60 is driven between both of its operational positions by a four-bar linkage assembly depicted generally at 145.
  • the constituent components of this four-bar linkage 145 commence with the pivotal coupling at shaft 72 of hinge extension 68 of the operator assembly 60.
  • Hinge extension 68 is configured having a second bore retaining another shaft 146 spaced forwardly from shaft 72.
  • Extension 68 additionally is formed having an access slot 148 within which pivotal 35 connection between shaft 146 and a draw-down link 150 is effected.
  • Draw-down link 150 is pivotally connected through a shaft 152 to the tip of dual arm portions 154 of a bell crank shown generally at 156.
  • hub portion 158 of bell crank 156 is rotatably mounted upon the necked or stepped-down portion 160 of a.
  • shaft 162 portion 160 of shaft 162 is rotatably supported within a bushing 164 fixed, in turn, to an extension 166 of camera frame l2.'An E-ring 45 restrains shaft 162 from lateral movement within its mountings.
  • the opposite end of shaft 162 is rotatably supported with a bushing 168.
  • Bushing 168 is retained within portion 144 of frame 12.
  • the operation of the bell crank assembly in driving operator assembly 60 into its exposure mode orientation and retaining the assembly 60 in its viewing mode orientation is more clearly revealed.
  • operator assembly 60 is retained in its viewing mode orientation by virtue of the 55 outward orientation of the dual arms 154 of hell crank 156.
  • Operator assembly 60 is driven to its exposure mode orientation, as shown partially and in phantom at 60', by a driving force exerted from bell crank 156 through the linkage 145.
  • the resultant orientations of bell crank 156 and draw-down link 150, respectively, are shown in phantom at 156 and 150'.
  • operator assembly 60 is driven into its exposure mode orientation as well as 65 returned to its viewing mode orientation by forces exerted from bell crank 156 through draw-down link 150.
  • Operator assembly 60 is driven from bell crank 156 into its exposure mode orientation by force derived from a low-rate multi-turn torsion spring 172.
  • a stationary end 174 of spring 172 is fixed or grounded to frame portion 144, while its opposite end 176 is configured to abut against a tang or extension 178 of a cylindrically-shaped sleeve 180.
  • sleeve 180 is generally configured as a hollow right cylinder having a thickened end portion 184 (FIG. the internal surface of which is bored to fit over the stepped-up diametral portion 186 of shaft 162.
  • Sleeve 180 is fixed Ito and co-rotatable with shaft 162 as a result of its connection thereto by pin 188.
  • thickened portion 184 sleeve 180 is formed having a diameter suited to provide for its slideable coupling over hub 158 of bell crank 156. This same portion of sleeve 180 additionally is cut away to provide top and bottom abutting or key surfaces shown, respectively, at 190 and 192.
  • a spiral override spring 191 mounted coaxially with spring 172 over the central portion of shaft 162 .
  • spring 191 Located within the interior of sleeve 180, one end of 194 of spring 191 is connected within the thickened portion 184 of sleeve 180.
  • the opposite tip 196 of spring 191 is connected to bell crank 156 by insertion within a slot 198 formed in hub portion 158.
  • Spring 191 is selectively prewound and has a strength sufficient to urge the bell crank toward positioning contact surface 192 ofsleeve 180.
  • a spacing allowing about 45 of relative rotation is prois fixed to portion 186 of shaft 162 by a pin 206 extending there through.
  • the tip portion of bell crank 204 is bored at 210 to provide a pivotal connection with the pin 212 of a kinematic linkage with which it is associated.
  • the thinness and compactness of the camera 10 is basically realized by the design feature of positioning processing station 124 along the forward edge of cassette 50; mounting motor and spring drive for operator assembly 60 along the opposite parallel edge of cassette 50 and by incorporating thin gear train 126 with an associated kinematic linkage along a third edge thereof.
  • Gear train 126 operates processing station 124 under critical rotational speed criteria, while its associated kinematic linkage develops cycle phase timing and requisite power outputs which are redirected toward the rear of the camera for the purpose, inter alia, of selectively manipulating operator assembly 60.
  • Gear train 126 consists of two power flow circuits, one leading to processing station 124 and the other leading to an intermediate output stage for developing rearwardly directed control motion.
  • first power flow circuit extending from input or first drive pinion 134 to the processing station 124, is illustrated schematically. This power flow circuit must meet the critical requirement of providing smooth and continuous power flow into the driven roll 122 of processing station 124. Further, the nominal speed of rotation of roll 122 must fall within acceptable limitations in order to provide proper spreading of processing fluids within a film unit as at 52.
  • the first circuit includes input gear 134, two reduction gears as at 220 and 222, five idler gears 224-232 and an output gear 234 coupled with roll 122 of processing station 124.
  • gears 220, 222 and 226 are ofa dual component variety to provide a requisite torque-multiplication factor within the compound gearing circuit.
  • the second power flow circuit of gear train 126 consists of input gear 134, three reduction gears 220, 222 and 226 and two idler gears 224 and 236.
  • the gear components within gear train 126 have maximum diameters somewhat corresponding with the height of base 12 of the camera and are mounted between one side 244 of an inner frame of the camera and an outer plate 246 extending along the length thereof. Plate 246 is mounted upon inner frame 244 by stand-off elements which are not illustrated in the interest of clarity. Inner frame 244 additionally serves as the mounting for roll 122 of processing station 124.
  • the dual power flow gear circuit arrangement permits gear train 126 to perform a variety of power and manipulative functions during a photographic cycle, while assuring a smooth and continuous rotational drive input to roll 122 of processing station 124.
  • This continuous power input to processing station 124 is developed by configuring the second power flow circuit to have a reduction ratio or torque multiplication factor which is substantially higher than that of the first power flow circuit.
  • the output torque developed from the second power flow circuit at timing gear 238 is returned or transmitted back to shaft 162 by a kinematic linkage including an elongate ram 250 operating between and in conjunction with a radial or disc cam 252 and the arm portion 208 of drive bell crank 204.
  • Cam 252 is fixed to and co-rotatable with timing gear 238.
  • a radial cam follower 254 fixed to the inward side of ram 250, provides selective follower contact with the profile of cam 252.
  • a slideable connection between an elongate slot 256 formed within the forward portion of ram 250 and the axle 258 of timing gear 238.
  • the opposite end of ram 250 is pivotally connected through pin 212 to the arm portion 208 of drive bell crank 204.
  • a positive drive condition is available between follower 254 and the profile of cam 252.
  • This positive drive results from a bias exerted from drive spring 172 through bell crank 156 and shaft 162 into drive bell crank 204.
  • Spring 172 continuously biases ram 250 to urge follower 254 toward the profile of cam 252. Simultaneously, spring 172 exerts a bias through the earlier described four-bar linkage 145 for moving operator assembly 60 into its erect exposure mode orientation.
  • the second power flow circuit of gear train 126 is designed to drive timing gear 238 at a rate providing for its rotation only through 360 during a photographic cycle.
  • the kinematic linkage including ram 250 is capable of performing several regulatory functions. For instance, selective switching which provides for monitoring the program of a photographic cycle. To derive this regulation, the profile of cam 252 is selectively configured.
  • a displacement diagram showing the action of cam 252 during the 360 of revolution of timing gear 238 is revealed.
  • the zero and 360 positions represent the orientation of timing gear 238 as well as cam 252 at the commencement or end of any given photographic cycle.
  • cam 252 incorporates an initial, high dwell portion 260 extending through about the first 10 of cam rotation.
  • Juxtaposed to high dwell portion 260 is a sudden return portion 261 which drops off immediately following high dwell portion 260 and continues as a low dwell 262 from 10 to Preferably, contact is not made between follower 254 and cam 252 during this low dwell interval.
  • the cam profile incorporates a rising profile 264.
  • the orientation of ram 250 and cam 252 when operator assembly 60 is in its viewing mode orientation is revealed.
  • arm portion 208 of drive bell crank 204 is held in its maximum rearward position.
  • bell crank 156 of the fourbar linkage 145 is retained in the solid line position shown in FIG. 6 as a'result' of its connection with shaft 162 through override spring 191.
  • the downward position of bell crank 156 holds operator assembly 60 in its spring loaded, viewing mode orientation by virtue of its connection with bell crank 156 through draw-down link 150.
  • Cam 252 and ram 250 serve to selectively latch the operator assembly 60 at its downward position. For instance, at the commencement of a photographic cycle, motor is briefly energized to cause rotation of timing gear 238 through about 10. As the sudden return portion 262 of the cam 252 is reached, ram 250 is releasedfor translational movement under the drive spring 172 bias exerted through drive bell crank 204. Simultaneously, bell crank 156 of the four-bar linkage is driven upwardly to rapidly raise the operator as semb l'y 60 to its erect exposure mode orientation. Motor l30,is.deenergized as the operator assembly 60 approaches its terminal position. The resultant orientation of cam 252, ram 250, the four-bar linkage 145 as well as operator assembly 60 is shown in FIG. 8.
  • cam 252 and ram 250 results in an important elimination of electromechanical latches and the like from the structure of the camera.
  • latches or the like necessarily would be mounted along the top surface of the camera frame. As such, they would contribute to an unwanted thickening of the housing at base 12.
  • latching step is carried out by multi-function components mounted along the side and back of the base 12.
  • FIG. 8 also reveals the presence of a small gap between the contact surface of follower 254 and the low dwell portion 262 of the profile of cam 252. This gap assures that ram 250 will be capable of traveling a distance sufficient to permit operator assembly 60 to fully rise to its exposure mode position against back wall 14.
  • ram 250 operating in response to the single cycle of rotation of, cam 252, provides a position responsive switch actuating function.
  • switching is used in a cycle phasing manner to provide for initial de-energization of motor 130 as well as system shut-down at the end of a photographic cycle.
  • Switch 270 is configured having an electrically insulated base 272 which is fixed to the inner side of outer plate 246.
  • Two electrically conductiveresilient contacts 274and 276 extend upwardly from switch 'base 272.
  • Switch 270 further includes a mechanical motion amplifier con figured as a lever 278 pivotally mounted upon a stud 280 extending from outer plate 246.
  • Lever 278 additionally is configured to support an outwardly extending stud 282 which is positioned for selective contact with a tab 284 formed integrally with and extending downwardly from ram 250.
  • Pivotal movement of lever 278 in a direction toward the front of the camera 10 is limited by a stud 286 fixed to and extending from outer plate 246.
  • Switch 270 is selectively actuated in correspondence with the movement ram 250. For instance, when camera 10 is in a viewing mode configuration, ram 250 isin a position wherein tab 284 contacts stud 282 in a manner holding the lever 278 in'a position causing contacts 274 and 276 to close a circuit. This orientation is shown in FIG. 4. With the initialenergization of motor 130 and consequent release of ram 250 over the sudden return portion 262 of cam 252, tab 284 is removed from contact with stud 282 to permit lever 278 to pivot forwardly and cause contacts 274 and 276 to assume an open circuit orientation.
  • switch 270 will remain closed for'whatever length of time the high dwell portion of the periphery of cam 252 is moved across follower 254. Accordingly, operator assembly 60 is not released for movement into its exposure mode orientation until timing gear 238 and its associated cam 252 are in a predetermined angular orientation.
  • This feature contributes to the simplification of the design of the camera, for instance, by minimizing a need for close tolerances and eliminating coasting errors which may otherwise accumulate from one photographic cycle to another.
  • the low dwell interval depicted at 292 is inserted within the cam 252 program for the purpose of completely isolating the second power flow circuit from the first power flow circuit at the commencement of the processing of a film unit 52 at station 124.
  • a forwardly positioned pod containing processing fluid must be ruptured.
  • no other loads are imposed upon motor 130 from gear train 126.
  • the commencement and termination of the processing operation are depicted by the extent of bar 294. Note that the processing period 294 commences at about 54 of timing gear rotation and is completed at about 248.
  • a photographic cycle continues with the opening of the blades of shutter for a regulated exposure interval.
  • solenoid is energized to close the shutter following which motor is again energized.
  • Energization of motor 130 causes timing gear 238 to resume rotation such that cam 252 rotates through low dwell as depicted at 292, following which follower 254 of ram 250 is again re-engaged by rising profile portion 264.
  • Continued rotation of timing gear 238 during this period of-a photographic cycle causes ram to be driven rearwardly, in turn, driving the arm portion 208 of drive bell crank 204 rearwardly.
  • FIG. 9 An orientation of the gear train assembly 126 and its associated kinematic linkage during this cocking procedure is illustrated in FIG. 9.
  • the interval during which the rising profile portion 264 of cam 252 is moved before follower 254 is shown at 296.
  • phasing bar 298 the point of engagement of rising profile portion 264 with follower 254 commences at about 142 of timing gear 238 rotation.
  • Cocking movement of operator assembly 60 from its exposure mode orientation toward its viewing mode orientation commences simultaneously with the start of ram 250 displacement. This movement is indicated by phasing bar 300.
  • FIGS. through 7 the operation of spring 192 in conjunction with the four-bar linkage 145 including bell crank 156 is portrayed.
  • ram 250 is urged rearwardly (toward the observer in FIG. 5) by the rising profile portion 264 of cam 252, shaft 162 is rotated, in turn, rotating or carrying spring 192 from its connection at 194.
  • the opposite tip 196 of spring 192 rotates bell crank 156 outwardly to drive or pull operator assembly 60 downwardly through the four-bar linkage 145.
  • drive spring 174 is wound as a consequence of its engagement with tang 178 on sleeve 180.
  • bell crank 156 halts.
  • timing gear 238 is rotated through one cycle of 360, arm 278 of of switch assembly 270 closes contacts 274 and 276. This closure .signals the control system of the camera that operator assembly 60 is down and that the timing gear 238 is in position for a next succeeding photographic cycle.
  • Closure of switch 270 de-energizes motor 130 as well as the control circuit of the camera, thereby automatically shutting down the entire system. Should the drive mechanism of the camera coast following shutdown, the above described override features of the erecting system for operator assembly 60 provides for correction in the next following photographic cycle. For instance, the operator assembly 60 will not be released until timing gear 238 has rotated to its proper position. Accordingly, no coasting errors or the like will accumulate from one photographic cycle to another.
  • Closure of the contacts of switch 270 provides for a complete shut-down of the control system of the cameraln this regard, the winding of solenoid 110 is tie-energized .to permit the blades of shutter 90 to resume their fully open status. Shutter blades 92 and 94 thus being open, camera is returned to its viewing mode orientation.
  • FIG. 13 a control circuit for causing the camera 10 to perform in the manner described is depicted.
  • a photographic cycle is commenced with the depression of actuating button 34 to close a switch 300.
  • switch 300 energizes main power lines 302 and 304 from a battery 306.
  • main power lines 302 and 304 As noted earlier, it is line 304 until such time asthe operator assembly 60 reaches its exposure mode configuration.
  • the outputs of such triggering systems or comparators are at the ground reference potential of line 304, they are referredto as low and when they assume the voltage status of source line 302, they are referred to as being high.”
  • Output 314 is coupled through a diode 316, bias resistor 318 and line 320 to the base electrode of a PNP transistor 0,.
  • the emitter of transistor Q is coupled through a line 322 to main power line 302 and its collector is connected with a secondary or logic power line 324.
  • the low status at output 314 of mode conversion timing function 308 at the commencement of a photographic cycle serves to forward bias the baseemitter junction of transistor 0,, thereby powering logic power line 324 from power line 302.
  • Energization of logic power line 324 from transistor Q serves initially to energize the shutter solenoid 110 by forward biasing the base-emitter junction of an NPN transistor Q Forward biasing current is directed to the base of transistor 0 from line 324 through a line 326, bias resistor 328, diode 330 and diode 332.
  • the emitter of transistor O is coupled to reference power line 304, while its collector is coupled to power line 324 through line 334 including resistors 336 and 338.
  • An on status at transistor O in turn, forward biases the baseemitter junction of a PNP transistor Q the base of which is connected to line 334 and resistor 336 from line 340.
  • the emitter of transistor 0 is connected with power line 324 and its collector is connected along a line 342 through resistors 344 and 346 to ground reference line 304. Conduction through line 342, in turn, forward biases the base-emitter junction of an NPN transistor 0 the base of which is connected to line 334 through line 348.
  • the emitter of transistor O is coupled to ground reference line 304, while its collector is connected through the winding 350 of a shutter actuating solenoid to power line 302. Winding 350 forms a component of the earlier described shutter solenoid 110. Accordingly, solenoid 110 is depicted functionally by a dashed boundary 110 in the instant figure.
  • the time interval required for solenoid 110 to cause shutter to close and thereby secure exposure chamber 42 is followed by an R-C timing network 356 comprised of resistor 368 and a capacitor 370 operating in conjunction with a differential comparator 358.
  • Differential comparator 358 is coupled to logic power line 324'from along line 360, and to ground reference line 304 from along line 362.
  • the comparator 358 is of conventional design, operating as a non-inverting amplifier.
  • the output of comparator 358 at line 364 may assume a high or low" status in response to the receipt at its input line 366 of a voltage signal, respectively, above or below a predetermined reference level. This signal is derived from the RC timing network 356.
  • Input 366 of differential comparator 358 is coupled to line 372 at a point within network 356 intermediate resistor 368 and capacitor 370.
  • Timing network 356 is designed having a time constant selected to reach the trigger level of differential comparator 358 in a period of time corresponding with the time required to assure that the blades of shutter 90 have moved from a fully open position to a fully closed position. During this timing interval, the output at line 364 assumes a low status. Timing operation of the network 356 is permitted as a result of the off status of an NPN transistor Q
  • the collector of transistor of O is coupled to line 372 intermediate resistor 368 and capacitor 370, and its emitter is connected through line 374 to ground reference line 304. Thus connected, transistor is used to selectively shunt capacitor 370 and reset network 356.
  • biasing current is supplied to the base thereof from logic power line 324 through line 376, bias resistor 378, line 380 and diode 382. At the commencement of a photographic cycle however, this current is diverted through diode 384 across a closed switch 390 to ground reference line 304.
  • Switch 390 is a phase cycle switch corresponding to switch 270 described earlier herein. Until operator assembly- 60 is released from movement from its cocked position, switch 390 remains closed.
  • timing network 356 achieves the threshold or reference voltage of comparator 358 following a period of time adequate to permit solenoid 110 to fully close the blades of shutter 90, the output at line 364 goes high.
  • a high output at line 364 terminates a clamping current flow from logicpower line 324 into line 392, bias resistor 394 and output line 364 of differential comparator 358.
  • current now passes through diode 396 to forward bias the baseemitter junction of an NPN transistor 0
  • the emitter of transistor O is connected with power reference line 304 and its collector is connected with power line 302 through a line 398 including bias resistors 400 and 402.
  • As current is conducted through transistor 0 the base-emitter junction of a PNP transistor 0 is forward biased.
  • the base of transistor Q is coupled to line 398 from along line 404, while its emitter is coupled to power line 302.
  • the collector of transistor O is coupled along a line 406 which, in turn, is connected to the terminals of a dc. motor 408 and with ground reference line 304.
  • Motor 408 corresponds with motor 130 of camera 10. With the forward biasing of transistor 0,, motor 408 is energized and operator assembly 60 is released for movement into its exposure mode orientation. As the operator assembly 60 leaves its cocked orientation, switch 390 is opened to de-energize motor 408 and activate mode conversion timing function 308. v
  • This initial de-energization of motor 408 is carried out by the reassertion ofa forward biasing current flow along line 376, through bias resistor 378, line 380 and diode 382 to the base of NPN transistor Q With the opening of the phase cycle switch 390, this forward biasing current is no longer diverted through diode 384 and the switch.
  • timing capacitor 370 of timing network 356 is shunted to ground reference line 304 through line 374. With the shunting of capacitor 370, the output at line 364 of differential comparator 358 goes low" and current at line 392 is diverted from the base of transistor Q into the output 364 of differential comparator 358.
  • switch 390 also permits the forward biasing of the base-emitter junction of an NPN transistor Q
  • the base of transistor 0 is connected with logic power line 324 through a line 422 including diode 424 and a bias resistor 426. Current flow through line 422 is diverted through line 428 and diode 430 into line 416 whenever switch 390 is closed. Accordingly, with the closure of switch 390, transistor O is off.
  • the emitter of transistor Q is coupled to ground reference line 304, while its collector is connected through resistor 318 and line 320 to the base of transistor Q.
  • a latching arrangement is provided thereby which serves to hold transistor Q on as long as switch 390 is open.
  • switch 390 de-activates another clamping arrangement including line 436 which extends through a diode 438 and bias resistor 440 to logic power line 324. Coupled to line 436 at a point intermediate diode 438 and bias resistor 440 is a line 442 incorporating diodes 444 and 446 and extending to the base of an NPN transistor.
  • the emitter of transistor 0 is connected to ground reference line 304 and its collector is connected through line 448, bias resistor 450 and line 452 to the base of a PNP transistor 0
  • a resistor 454 is connected in line 448 between line 452 and logic power line 324 to provide turn-of bias at transistor 0,
  • the emitter of transistor Q is connected to logic power line 324 through line 458 and its collector is connected with an exposure function power line 460.
  • Transistors Q and Q being thus interconnected, when transistor 0,, is forward biased by current from line 442, through diodes 444 and 446, conduction to ground line 304 will be completed and the base-emitter junction of transistor Q will be forward biased. However, when switch 390 is closed, current otherwise forward biasing transistor O is diverted along the clamping arrangement including line 436 and switch 390.
  • Conduction across transistor Q also activates a current diverting line 476 extending from line 326, through diode 478 and to the collector side of transistor Q,,.
  • line 476 serves to divert biasing current passing through line 326 and bias resistor 328 from the base of transistor Q
  • transistor 0 is reverse biased into an off" status simultaneously with the energization of exposure function power line 460.
  • transistor O is reverse biased, transistors 0 and Q correspondingly are reverse biased.
  • winding 350 of solenoid 110 is de-energized to release the elements of camera shutter 90 for movement from a fully closed position toward an open position.
  • the output at line 480 of exposure control function 470 remains low" until an exposure detecting function therein reaches the threshold value of a differential comparator also contained therein. When this threshold level is reached, the comparator triggers to rapidly change the output at line 480 to a high" status.
  • current is permitted to pass from line 460 through a bias resistor 482 to communicate with ground level through control function 470-and line 474.
  • the output of exposure control function 470 at line 480 will assumea high status to cause the forward biasing of transistor causes shutter to reclose and terminate an exposure.
  • line 494 also forward biases the baseemitter junction of transistor Q
  • the emitter of transistor Q is connected to ground reference power line 304 and its collector is connected to line 376.
  • current from line 496 forward biases transistor Q current from line 376 is diverted from line 380 and a forward bias at transistor Q, is removed.
  • the shunt about timing capacitor 370 is removed and timing network 356 commences to time-out the period required for the blades 92 and 94 of shutter 90 to close.
  • the output at line 364 of differential comparator 358 remains low until this shutter timing period terminates, at which time the output of the differential comparator 358 at line 364 assumes a high state. While the output at line 364 remains high, the baseemitter junction of transistor O is forward biased from along line 392 and diode 396. When transistor 0 is forward biased, transistor O in turn, is forward biased to cause motor 408 to be re-energized from line 406 and power line 302.
  • switch 390 (represented as switch 270 in the mechanical drawings) again is closed.
  • switch 390 closes, forward biasing current otherwise directed to transistor O is diverted through diode 430 and line 416 through the switch to power reference level line 304.
  • Transistor O is reverse biased and, in turn, transistor Q, is reverse biased.
  • the resultant de-energization of logic power line 324 shuts down the entire circuit to terminate a photographic cycle.
  • the control circuit described above ideally cooperates with the earlier described functional components of camera 10.
  • the circuit performs throughout a complete photographic cycle in response to the actuation of the single-phase controlling switch as shown at 270.
  • the system is capable of accommodating for variations of exposure intervals during a photographic cycle.
  • the circuit responds to ram 250 actuation of switch 270 to energize motor twice during'a cycle.
  • the circuit is automatically shut down in preparation for a succeeding exposure cycle.
  • the logic of the circuit desirably complements the mechanical logic of camera 10.
  • the circuit of FIG. 8 is described in detail and claimed in a copending application for U.S. Pat. by Edwin K. Shenk, entitled, Camera With Motorized Reflex Assembly, filed of even date herewith Ser. No. l34,725 and assigned in common herewith.
  • a hand-held photographic camera comprising:
  • said housing means for supporting a supply of photographic film units for sequential exposure at an exposure station, said supply representing an occupied space having given sides and volume;
  • processing means mounted within said housing means adjacent one said side of said supply of film units occupied space and driveable to process individual ones of said film units following the said exposure thereof;
  • motor means mounted within said housing means adjacent a said side of said supply of film units occupied space opposite said one side for providing a drive output; and I drive means supported within said housing means along a said side of said supply of film units occupied space adjacent said one side and connected between said motor means drive output and said processing means for driving said processing means from said motor means.
  • a hand-held photographic camera comprising: housing means for supporting a quantity of photoside and end walls; means for effecting the sequential exposure of said film units at said exposure station;
  • processing means mounted within said housing means adjacent one side of said film units and actuable to process individual ones of said film units following the said exposure thereof;
  • a hand-held photographic camera comprising: housing means having components articulated to fold from an operational erected configuration to a compact configuration approximating the shape of a thin parallelepiped with narrow sidewalls, said components including base means for supporting a quantity of photographic film units for sequential exposure at an exposure station; 6
  • processing means mounted within said housing means and having an operational position adjacent one side of said quantity of film units, said 6 processing means being actuable to process individual ones of said film units following the said exposure thereof;
  • drive means mounted within said housing means and positioned along a side of said base means extending along another side of said film units adjacent said one .side, so that said drive means extends along a said thin sidewall of said parallelepiped shape, said drive means being driveable from said motor means drive output and operative to actuate said processing means when driven.
  • said housing means is articulated to fold from an operational erected configuration to a compact configuration approximating the shape of a thin parallelepiped with narrow side walls;
  • said drive means is supported within said housing such that it extends along a said narrow side wall of said shape.
  • a hand-held photographic camera comprising:
  • processing means mounted within said housing means adjacent one side of said film units and driveable at a predetermined rate to process individual ones of said film units following the said exposure thereof;
  • drive means supported within said housing means along a side of said film units adjacent said one side said drive means including a thin elongate gear train having an input connected with said .motor means drive output and having one branch of selected output reduction ratio for driving said processing means at said predetermined rate and having another branch the output of which has a reduction ratio substantially greater than said select output reduction ratio, and kinematic drive means coupled in driven relationship with said gear train other branch output for providing a select control of instrumentalities within said camera.
  • Photographic apparatus for exposing and processing photosensitive film units comprising:
  • reduction gearing means coupled to be driven from said motor, said gearing means having one branch of select output reduction ratio for rotatably driving said processing means at said predetermined rate and having another branch the output of which has a reduction ratio substantially greater than said one branch select ratio;
  • control means for selectively actuating said exposure instrumentation means and said motor during a photographic cycle thereof.
  • said kinematic means is operative to selectively retain said exposure instrumentation means mechanism in said cocked position.
  • cam means coupled for co-rotation with said other reduction gearing means branch output;
  • kinematic linkage means engageable with said expo sure instrumentation means and said cam means for transmitting force therebetween.
  • said cam means is formed having a periphery with a high dwell portion
  • said kinematic linkage means includes a follower surface contactable with said cam means high dwell portion to selectively retain said exposure instrumentation means mechanism in said cocked position.
  • said cam means is formed having a periphery defining a high dwell portion in juxtaposition with a sudden return portion
  • said kinematic linkage means is contactable with said periphery, is operative to retain said exposure instrumentation means mechanism in said cocked position when in contact with said high dwell portion, and is operative to release said mechanism for movement under said spring bias when in operative association with said sudden return portion.
  • said cam means is formed having a periphery defining a low dwell portion and a rising profile portion; and said kinematic linkage means is operatively associated with said low dwell portion when a said processing of a said film unit commences and is subsequently contactable with said rising profile portion during a said photographic cycle to effect said movement of said exposure instrumentation means mechanism against said spring bias into said cocked position.
  • said reduction gearing means other branch is con- 5 figured to provide an output having aperiod of rotation selected as one revolution for each said photographic cycle.
  • a reflex camera comprising in combination: optical path means having a viewing mode configuration and an exposure mode configuration for imaging a scene to be photographed at a focal plane;
  • cam means coupled for corresponding rotation with said reduction means output stage and having a periphery defining a predetermined rising profile portion and a sudden return portion;
  • control means for actuating said motor means to cause selective rotation of said reduction means output stage.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Transmission Devices (AREA)
  • Cameras Adapted For Combination With Other Photographic Or Optical Apparatuses (AREA)
  • Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
US00134733A 1971-04-16 1971-04-16 Reflex camera Expired - Lifetime US3714879A (en)

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DE (2) DE2218545A1 (de)
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Cited By (12)

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Publication number Priority date Publication date Assignee Title
US3889280A (en) * 1973-12-20 1975-06-10 Polaroid Corp Belt driven automatic reflex camera
US3906527A (en) * 1974-07-01 1975-09-16 Polaroid Corp Shaft drive and control system for automatic camera
US3936847A (en) * 1974-07-01 1976-02-03 Polaroid Corporation Shaft drive and control system for automatic camera
US4020499A (en) * 1976-03-01 1977-04-26 Eastman Kodak Company Apparatus for controlling drive to pressure rollers in a camera with electric motor drive
US4070684A (en) * 1975-07-17 1978-01-24 Eastman Kodak Company Shutter release blocking device for foldable camera
US4160589A (en) * 1978-03-03 1979-07-10 Polaroid Corporation Combined solenoid and timing system for SLR camera apparatus
US4226519A (en) * 1979-04-02 1980-10-07 Polaroid Corporation Self-developing film pack with improved spread control structure
US4251146A (en) * 1979-01-29 1981-02-17 Polaroid Corporation Photographic apparatus for providing a signal visible in a camera viewfinder
US4254191A (en) * 1977-01-24 1981-03-03 Polaroid Corporation Method for manufacturing battery vents and vented batteries
EP0129107A2 (de) * 1983-06-20 1984-12-27 International Business Machines Corporation Magnetbandaufnahme- und wiedergabesystem
JPH026A (ja) * 1987-11-23 1990-01-05 Polaroid Corp 写真カメラ
US5315344A (en) * 1991-03-29 1994-05-24 Polaroid Corporation Microscope camera

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US3040642A (en) * 1959-06-12 1962-06-26 Robertson Photo Mechanix Inc Photographic apparatus
US3405617A (en) * 1965-11-26 1968-10-15 Polaroid Corp Photographic apparatus, product and processes
US3537370A (en) * 1967-09-18 1970-11-03 Polaroid Corp Camera structure

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DE1795083U (de) * 1956-11-14 1959-09-03 Agfa Ag Fotografische kamera mit elektromotorantrieb.
US3447437A (en) * 1967-07-25 1969-06-03 Polaroid Corp Photographic processing apparatus
US3511152A (en) * 1968-03-18 1970-05-12 Polaroid Corp Film advancing apparatus
US3589262A (en) * 1968-06-21 1971-06-29 Polaroid Corp Photographic processing apparatus

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3040642A (en) * 1959-06-12 1962-06-26 Robertson Photo Mechanix Inc Photographic apparatus
US3405617A (en) * 1965-11-26 1968-10-15 Polaroid Corp Photographic apparatus, product and processes
US3537370A (en) * 1967-09-18 1970-11-03 Polaroid Corp Camera structure

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3889280A (en) * 1973-12-20 1975-06-10 Polaroid Corp Belt driven automatic reflex camera
US3906527A (en) * 1974-07-01 1975-09-16 Polaroid Corp Shaft drive and control system for automatic camera
US3936847A (en) * 1974-07-01 1976-02-03 Polaroid Corporation Shaft drive and control system for automatic camera
US4070684A (en) * 1975-07-17 1978-01-24 Eastman Kodak Company Shutter release blocking device for foldable camera
US4020499A (en) * 1976-03-01 1977-04-26 Eastman Kodak Company Apparatus for controlling drive to pressure rollers in a camera with electric motor drive
US4254191A (en) * 1977-01-24 1981-03-03 Polaroid Corporation Method for manufacturing battery vents and vented batteries
US4160589A (en) * 1978-03-03 1979-07-10 Polaroid Corporation Combined solenoid and timing system for SLR camera apparatus
US4251146A (en) * 1979-01-29 1981-02-17 Polaroid Corporation Photographic apparatus for providing a signal visible in a camera viewfinder
US4226519A (en) * 1979-04-02 1980-10-07 Polaroid Corporation Self-developing film pack with improved spread control structure
EP0129107A2 (de) * 1983-06-20 1984-12-27 International Business Machines Corporation Magnetbandaufnahme- und wiedergabesystem
EP0129107B1 (de) * 1983-06-20 1989-08-09 International Business Machines Corporation Magnetbandaufnahme- und wiedergabesystem
JPH026A (ja) * 1987-11-23 1990-01-05 Polaroid Corp 写真カメラ
JP2836827B2 (ja) 1987-11-23 1998-12-14 ポラロイド コーポレーシヨン 写真カメラ
US5315344A (en) * 1991-03-29 1994-05-24 Polaroid Corporation Microscope camera

Also Published As

Publication number Publication date
HK19476A (en) 1976-04-09
FR2139833B2 (de) 1981-11-27
DE2265526C3 (de) 1982-01-21
DE2218545A1 (de) 1972-11-16
DE2265526B2 (de) 1981-04-16
CA979258A (en) 1975-12-09
AU462360B2 (en) 1975-05-26
AU4119072A (en) 1973-10-18
NL7205045A (de) 1972-10-18
GB1354236A (en) 1974-06-05
FR2139833A2 (de) 1973-01-12

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